Spence, Popol Vuh. London, 1908.

Tonalamatl of the Aubin-Goupil Collection, 1900–1901.

This circular patch with the centre punched out is worn by the women of more than one Asiatic country.

Sahagun, Bks. viii and x.

By Seler, in Commentary on Aubin Tonalamatl, p. 93.